I posted a similar topic a while ago, asking for a Deinochycus Wild Shape. But I think this one would be more balanced and useful.

What I am suggesting, is making a free feat, called Dinosaur Wild Shape given to Druids when they reach level 8. Why? Because levels 5 to 12 are empty of any wild shape ability. At level 5 druids get the basic animals. Mediocre forms.At level 12 they get both Dire forms and Plant Shapes. The Treant outclasses the Dire Bear in EVERYTHING. Strength, base damage, AC, HP and immunities.At level 16 they get the Huge Elementals which rock.At level 20 they get the Elder Elementals which are even better.At level 25 with your upcoming update, they get Ember Guard.At level 26-30 they get the awesome Dragon shape.

Basically, every 4-5 levels they get new and stronger forms, which make the druid really fun.But. The levels 5-12 are empty. That's 7 levels of no new forms and the basic animals become useless very quickly.Per PnP a Druid can change into a Megaraptor at level 8, which fills the gap between the basic animals and the dire/plant shapes, nicely.

This is not unbalancing at all. The Megaraptor exists as of Storm of Zehir so you don't have use any custom models. Everyone that uses your pack and plays online has all expansions anyway.About its stats. They are better than the basic animals but worse than the Dire Bear/Treant. Here's a comparison:

Personally, I believe this is a much needed fun and very balanced boost that druids need at lower levels. It's not about making the druids stronger, it's about making them more fun to play and giving them more options and gradual improvements, exactly like you are doing with Ember Guard in epic.